V8 Sampling Profiler: Collect V8 JitCodeEvents in tracing

base/debug/trace_event.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This header file defines the set of trace_event macros without specifying
 // how the events actually get collected and stored. If you need to expose trace
 // events to some other universe, you can copy-and-paste this file as well as
 // trace_event.h, modifying the macros contained there as necessary for the
 // target platform. The end result is that multiple libraries can funnel events
 // through to a shared trace event collector.
@@ skipping 332 matching lines @@
         traceEventSamplingScope(category "\0" name);
 
 // Syntactic sugars for the sampling tracing in the main thread.
 #define TRACE_EVENT_SCOPED_SAMPLING_STATE(category, name) \
     TRACE_EVENT_SCOPED_SAMPLING_STATE_FOR_BUCKET(0, category, name)
 #define TRACE_EVENT_GET_SAMPLING_STATE() \
     TRACE_EVENT_GET_SAMPLING_STATE_FOR_BUCKET(0)
 #define TRACE_EVENT_SET_SAMPLING_STATE(category, name) \
     TRACE_EVENT_SET_SAMPLING_STATE_FOR_BUCKET(0, category, name)
 
+#define TRACE_EVENT_SAMPLE_METADATA0(category, name)                   \
+  INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_METADATA, category, name, \
+                           TRACE_EVENT_FLAG_NONE | TRACE_EVENT_SCOPE_THREAD)

[yurys, 2015/01/14 13:41:36]

TRACE_EVENT_SCOPE_THREAD here and below?

[alph, 2015/01/14 14:31:10]

The flag and scope are different domains, so I specified both.
Actually I copypasted that from INSTANT_EVENT.
Anyway these are gone.

+
+#define TRACE_EVENT_SAMPLE_METADATA1(category, name, arg1_name, arg1_val)    \
+  INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_METADATA, category, name,       \
+                           TRACE_EVENT_FLAG_NONE | TRACE_EVENT_SCOPE_THREAD, \
+                           arg1_name, arg1_val)
+
+#define TRACE_EVENT_SAMPLE_METADATA2(category, name, arg1_name, arg1_val,    \
+                                     arg2_name, arg2_val)                    \
+  INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_METADATA, category, name,       \
+                           TRACE_EVENT_FLAG_NONE | TRACE_EVENT_SCOPE_THREAD, \
+                           arg1_name, arg1_val, arg2_name, arg2_val)
 
 // Records a single BEGIN event called "name" immediately, with 0, 1 or 2
 // associated arguments. If the category is not enabled, then this
 // does nothing.
 // - category and name strings must have application lifetime (statics or
 //   literals). They may not include " chars.
 #define TRACE_EVENT_BEGIN0(category_group, name) \
     INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
         category_group, name, TRACE_EVENT_FLAG_NONE)
 #define TRACE_EVENT_BEGIN1(category_group, name, arg1_name, arg1_val) \
@@ skipping 1217 matching lines @@
   const char* name_;
   IDType id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
 };
 
 } // namespace debug
 } // namespace base
 
 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */